Same problem as NON.
Windows 10.

  • Open the GUI.
  • Click on “sign in”
  • Had to be really quick to capture the attached screemshot
  • Can’t even start to type anything in the boxes before the GUI closes

Something like this should have come up in Alpha testing already.
A very clear sign to me that avast isn’t doing anything close to decent Alpha (internal) testing at all. >:(